JPS5650721A - Manufacture of long pipe by press die - Google Patents

Manufacture of long pipe by press die

Info

Publication number
JPS5650721A
JPS5650721A JP12483679A JP12483679A JPS5650721A JP S5650721 A JPS5650721 A JP S5650721A JP 12483679 A JP12483679 A JP 12483679A JP 12483679 A JP12483679 A JP 12483679A JP S5650721 A JPS5650721 A JP S5650721A
Authority
JP
Japan
Prior art keywords
die
blank
type
hereby
forming
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP12483679A
Other languages
Japanese (ja)
Other versions
JPS5726846B2 (en
Inventor
Hideo Ogawa
Kimio Tamura
Takeo Nakagawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AMINO TEKKOSHO KK
Original Assignee
AMINO TEKKOSHO KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by AMINO TEKKOSHO KK filed Critical AMINO TEKKOSHO KK
Priority to JP12483679A priority Critical patent/JPS5650721A/en
Publication of JPS5650721A publication Critical patent/JPS5650721A/en
Publication of JPS5726846B2 publication Critical patent/JPS5726846B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To form the sheet blank successively from one end into O type through the U type section, and to manufacture various kinds of pipes in dissimilar diameters in a small lot, by closely arranging in series the U-forming die and the O- forming die in which the forming stroke is longitudinally changed.
CONSTITUTION: The die 1 is provided with the inclined zone 1a for a specified length from the inlet; hereby, the blank 4 is fed to the inlet under the flat sheet condition and is shaped into increasing curvature with advance into the depth of the die. Next, the blank 4 enters the horizontal die 1b and is into the U type; hereby, the U type part 4' is successively formed. Then, the blank enters the O-die 2; since the specified length of the upper die 21 is being prepared as the inclined surface 23, the forming stroke of the upper die 21 continuously changes; hereby, the bending of the edge of the blank is initiated, and the blank is formed round in front of the inclined die section 2a, and is gradually formed into the final O-shape by the horizontal die section 2b. The O-shape blank is sent to the welding pass and is welded.
COPYRIGHT: (C)1981,JPO&Japio
JP12483679A 1979-09-28 1979-09-28 Manufacture of long pipe by press die Granted JPS5650721A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12483679A JPS5650721A (en) 1979-09-28 1979-09-28 Manufacture of long pipe by press die

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12483679A JPS5650721A (en) 1979-09-28 1979-09-28 Manufacture of long pipe by press die

Publications (2)

Publication Number Publication Date
JPS5650721A true JPS5650721A (en) 1981-05-08
JPS5726846B2 JPS5726846B2 (en) 1982-06-07

Family

ID=14895286

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12483679A Granted JPS5650721A (en) 1979-09-28 1979-09-28 Manufacture of long pipe by press die

Country Status (1)

Country Link
JP (1) JPS5650721A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS525467A (en) * 1975-07-02 1977-01-17 Shigeo Handa Method of plating throughhholes opposite copper surfaces of printed circuit wiring board

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS525467A (en) * 1975-07-02 1977-01-17 Shigeo Handa Method of plating throughhholes opposite copper surfaces of printed circuit wiring board

Also Published As

Publication number Publication date
JPS5726846B2 (en) 1982-06-07

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